extensor
noun/ɪkˈstensə(r)/
/ɪkˈstensər/
(also extensor muscle)
(anatomy)- a muscle that allows you to make part of your body straight or stretched out compare flexorTopics Bodyc2Word Originearly 18th cent.: from late Latin, from extens- ‘stretched out’, from the verb extendere ‘stretch out’, from ex- ‘out’ + tendere ‘stretch’.
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extensor